MARC trains set a record with an average weekday ridership of 35,210 in February, while the Maryland Transit Administration also set an overall record in February for average weekday ridership through its transit system.

The Maryland Transit Administration reports that CSX has issued heat restrictions for its tracks. This will affect commuter trains traveling on the Brunswick and Camden lines, which will operate at reduced speeds Tuesday afternoon, the MTA said. .

Seventy of the 900 passengers who were stranded on a MARC train that broke down Monday evening without air conditioning have signed a petition because they were "concerned and disgruntled" with how the incident was handled, said Calvin Spears, a passenger who collected the signatures.

The overhead wires that power locomotive engines navigating the Union Station railyards failed this afternoon, and all early-evening MARC trains passing through will experience delays, according to the commuter rail agency.

MARC train 538 on the Penn Line has been stopped south of New Carrollton for more than an hour, leaving passengers restless and wondering what's going on. MARC says a mechanical problem will delay the train by a total of 75 to 90 minutes; a rescue locomotive was dispatched to the scene around 6:30.